Hemp Research — Page 10

Peer-reviewed industrial hemp research papers, sorted by publication date. Browse the latest findings on hemp cultivation, processing, materials science, biomedical applications, and regulatory science from PubMed, OpenAlex, and other indexed sources.

Percolation threshold of multiwall carbon nanotube-PVDF composite for electromagnetic wave propagation (2020)

Abstract Advanced physical properties of conductive polymers fibre composites have attracted the attention of material scientists. Here, we produced a polymer fibre composite with aligned multiwall carbon nanotube (MWCNT) of different weight fractions, ranging from 0.25 wt% to 1.5 wt%. At 1.5 wt% additive, a conductor-non-conductor transition occurs that is percolation threshold. This effect enhances the electrical conductivity of polymer composite from 0.050 S m−1 to 326.250 S m−

Contribution to the percolation threshold study of Silicon carbide filled polydimethylsiloxane composites used for field grading application (2024)

The correlations between the electrical behavior and microstructural properties of samples consisting of particle composites fabricated from SiC particles embedded in a silicone matrix, were investigated using X-ray computed tomography. In the voltage field range 200-1000 V/mm, the measured conductivity as a function of SiC volume fraction exhibits two distinct gaps. Upon further investigations, we attribute these observations to percolation thresholds at the microscale. The first gap, correspon

Directed percolation threshold of sea ice permeability and electrical conductivity  (2025)

The transport of fluid and gas through sea ice has an impact on many sea ice properties and atmosphere-ice-ocean exchange processes. It depends on the details of the sea ice pore space. Of particular interest is the condition at which the pore space is no longer connected, often termed the percolation threshold, for which most investigators have proposed/accepted a value of 5 % in the brine volume fraction. However, direct observations have been sparse and theories to predict the threshold have

Auto-Combustion of Corn Straw: Production and Characterization of Corn Straw Ash (CSA) for Its Use in Portland Cement Mortars (2024)

Agricultural waste availability implies the possibility of recovering energy as biomass. The collateral effect is the production of ashes that, in some cases, have the potential to be reused in the manufacture of cement, mortar, and concrete. This article presents the study of the auto-combustion (unlike all previous studies) of corn (maize) straw (stems and leaves). The auto-combustion temperature was monitored, and the obtained corn straw ash (CSA) was characterized by means of X-ray fluoresce

Study on the co-combustion behavior of rice straw with coal gangue and fixation of alkali metals and ash melting characteristics (2024)

Abstract Because it is clean, low carbon, and renewable, biomass offers the greatest practical value. Nevertheless, during combustion, issues like slagging, agglomeration, and corrosion can occur due to the high concentration of Cl and alkali metals (K and Na), which lowers combustion efficiency. On the other hand, gangue (CG), when combined with biomass as an additive, can successfully prevent slagging during the burning process. However, more research is needed to determine how CG affe

Exergy-based assessment of a phase change material–desiccant wall panel for simultaneous indoor temperature and humidity control (2026)

In this study, the exergy behavior of a single-zone room equipped with a composite wall containing a phase change material (PCM) and a moisture absorber is investigated in a one-dimensional, coupled heat–humidity–exergy manner. First, the simultaneous heat and moisture transfer equations in the PCM–absorbent layer and the indoor air volume model are solved, and then, based on the results, the instantaneous and cumulative exergy balances for the main components, including ventilation, wall heat f